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scripts/kallsyms: exclude symbols generated by itself dynamically

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Drop the symbols generated by scripts/kallsyms itself automatically
instead of maintaining the symbol list manually.

Pass the kallsyms object from the previous kallsyms step (if it exists)
as the third parameter of scripts/mksysmap, which will weed out the
generated symbols from the input to the next kallsyms step.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Masahiro Yamada
2023-03-08 20:52:39 +09:00
parent c4802044a0
commit ca09bf48f9
3 changed files with 13 additions and 20 deletions
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11
scripts/mksysmap
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@@ -4,7 +4,7 @@
# tools to retrieve the actual addresses of symbols in the kernel.
#
# Usage
# mksysmap vmlinux System.map
# mksysmap vmlinux System.map [exclude]
#####
@@ -52,4 +52,13 @@ ${NM} -n ${1} | sed >${2} -e "
# for LoongArch?
/ L0$/d
# ---------------------------------------------------------------------------
# Ignored kallsyms symbols
#
# If the 3rd parameter exists, symbols from it will be omitted from the output.
# This makes kallsyms have the identical symbol lists in the step 1 and 2.
# Without this, the step2 would get new symbols generated by scripts/kallsyms.c
# when CONFIG_KALLSYMS_ALL is enabled. That might require one more pass.
$(if [ $# -ge 3 ]; then ${NM} ${3} | sed -n '/ U /!s:.* \([^ ]*\)$:/ \1$/d:p'; fi)
"